Cam stop strip for keyboard assemblies of machines for casting lines of type



7 1,638,799 L CURLE YBOARD ASSEMBLIES OF MACHINES FOR CASTING LINES OFTYPE Filed July 6 1926 Aug. 9, 1927.

CAM STOP STRIP FOR KE EM) 6601 6L. Czi e l? %1MZ Patented Aug. 9, 19 27.

UNITED STATES PATENT OFFICE.

GEORGE LOUIS CURLE,'OF MINNEAPOLIS, MINNESOTA.

CAM STOP STRIP FOR KEYBOARD ASSEMBLIES OF MACHINES FOR CASTING LINES OFTYPE.

Application med July 6, 1926. Serial No. 120,576.

My present invention relates to the assembling mechanism of machines forcasting lines of type,and has for its object to provide an improved camstop strip forthe keyboard assembly.

Cam stop strips now used are'in the form of a comb in which the teeth,commonly referred to as pins, are integrally formed with the bodythereof. It often happens that during the operation of a machine forcasting lines of type, one of the pins ofthe camstop strip breaks, thusne'cessitating'the stopping of the machine and the removal of the entirecam stop strip, which is of no further use and may be thrown away, andthe,

substitution of a new striptherefor. There is not only-considerableexpense in making this replacement, but a relatively large amount of amechanics time is required in doing the work, 'which includes theresetting of the pins of the cam stop strip in their proper relation tothe cams, and during this time, the machine and operator are idle.

My invention provides a cam-stop strip having independentlyremovableandreplaceable pins, which, in case one breaks, may be easily removedand a newone substituted therefor without removing said strip from themachine. In making such a replacement, it is only necessary to reset therespective pin, as the other cams and pins have not been disturbed andremain in the same relation as when the machine was stopped.

The said invention'further provides a cam stop strip having pins thatare mounted for slight independent angular movement lon-' gitudinally ofsaid strip to compensate for any difference in the spacing of the camsand the co-operating pins or in case they are slightly out of alignment;

In the accompanying drawings, which illustrate the invention,like'characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a fragmentary rear elevation of the keyboard assembly havingthe invention embodied therein, with some partssectioned on the line 11of Fig. 2; Fig.- 2 is a view partly in side elevation and partly insection of Fig. 1; V

taken onthe line 2+2 5 i the bars 18, and vertically movable rods 20 indiflerent positions by means of broken 1 lines;

Fig. 4 is a fragmentary detail view showing one of the pins removed fromthe strip, with some parts sectioned; and

F ig.- 5 is a perspective view of the cam stop strip with the pinsremoved.

The improved cam stop strip comprises a bar7, which is substantiallysquare in cross section, and a plurality of individual removable andreplaceable pins 8 having relatively long cylindrical heads 9, thatextend entirely from the faces of said pins and transversely thereof.The pin heads 9 are removably mounted in bore-like seats 10 that extendtransversely through the bar 7 from f the front to the rear thereof, andthe pins 8 eX- tend through contracted passageways-11, the latterextending from said seats through the bottomof said bar 7. The long pinheads 9 hold the pins 8 against angular movement transversely of thebarf7. The passageways 11 extend-completely through the bar 7 from 'thefront to the rear thereof and are arranged to receive the pins 8 as theheads 9 are inserted into the seats 10 from the front of said bar. Saidpassageways 11 are slightly wider than the pins 8 to permit a slightangular movement of said pins longitudinally of the bar 7 by a rockingmovement of the pin heads 9 in their seats 10 for a purpos thatwillpresently appear. For the purpose of showing the invention embodiedin the keyboard assembly of a machine for casting lines of type, thereare fragmentarily illustrated in the drawings the following part s'of aMergenthaler linotype casting machine, to wit: front and rear framebars12 and 13, respectively, driven cam-rotating roll 14, horizontalcamsupporting yokes 15 having their front ends removably pivoted at 16to the front frame member 12, which permits vertical swinging movementof said yokes, rotatable cams 1 7 journaled in the yokes 10,key-actuated vertically movable bars 18, bell cranks 1.9 for supportingand operating the yokes 15 from for operating the mechanism forreleasing the matrices.

The front lower corner of the rear frame member 13 is longitudinallyrabbeted to form a seat 21 for the cam stop strip furnished with themachine, but for which strip my improved cam stop is substituted, asbest shown in Fig. 2. The cam stop strip furnished with the machine isrelatively thin and secured to the frame member 13 by aplurality ofscrews, which must be removed when the cam stop strip is detached fromthe machine in case one of its pins are broken. My improved cam stopstrip is of such size as to completely fill the seat 21 and is securedto the frame member 13 by a pair of screws 22. .lVith the bar 7 thusmounted, the pins 8 and their heads 9 engage the rear frame member 13 asan abut mentfor holding said pins against rearward movement from saidbar, but which pins are individually free all times for withdrawal fromtheir seats 10 by a forward movement. Each cam 17 comprises twoconnected laterally spaced members having peripherally serrated portionsand an abutment 25 between said members in case the pins 8 and cam 17are not spaced quite the same or if they are not quite true. In applyingthe pins 8 to the bar 7 they are inserted between the members of thecams 17 and are of such length as to be engaged by the abutments 25.

Normally, the keyboard bars 18 are clepressed with their bell cranks 19holding the yokes in intermediate positions in which the cams 17 arestopped by the engagement of their abutments 25 with the pins 8 of thecam stop strip. When the cams 17 are stopped by the pins 8, theirserrated portions are directly over the roll 141 and out of engagementtherewith.

When an operator wishes to release a certain matrix, he depresses theproper key, not shown, and thereby raises the respective key bar 18,which moves its'bell crank 19 into a position to lower the engaged yoke15 and bring its serrated portion into contact with the rotating roll 11 to be rotated thereby in the direction of the arrow marked thereon init may be here stated that each time a key is depressed the respectivecam 17 is given one complete rotation, partly by the roll 1-1 and partlyunder the action of gravity. Said cam 17, during its initial rotarymovement by the roll 14;, raises the yoke 15 which, in turn, lifts therod 20 and th reby operates the proper mechanism for releasing therespective matrix. At the timethe cam 17 is lowered onto the roll 14 bythe bell crank 19, its abutment is carried below the co-operatin g pin 8of the cam stop strip so to release said cam and permitthe same to berotated. The cam 17 is given substantially two-thirds of a rotation Fig.2.

which operates the bell crank 19 to release the yoke 15 and allow thecam 17 to loosely rest on the roll 19 through substantially two-thirdsof its rotation, and at the completion of this portion of the rotationof said cam, the yoke 15 reengages the bell crank 19 and is supportedthereby to hold the cam 17 out of engagement with the roll 9. At thecompletion of the rotation of the cam 17, its abutment 25 engages therespective pin 8 on the cam stop strip and is again properly positionedwith its serrated portions overlying the roll 1 1 and out of engagementtherewith.

In case one of the pins ,8 is broken, it is only necessary to remove thesame by means of a pair of pliers, and insert a new pin into therespective seat 10. When a broken pin 8 is removed from the bar 7, therespective cam 17 is released by the withdrawal of said pin from back ofits abutment 25 and drops onto the roll 1%. Upon starting the machineafter the broken pin has been replaced by a new one the released cam 17resting on the roll 14 will be rotated by said roll until it is stoppedby the engagement of its abutment with the new pin 8.

As the strain on the pins 8, by the engage ment of theabutments 25therewith in step pin the rotation of the cam 17and holding the samefrom droppingonto the roller 14, is in a direction to hold said pinspressed into their seats and against the rear frame member 13 as anabutment there'is no need of securing said pins in their seats.

It will thus be seen that after the bar is once applied to a machine, itneed never be removed and it isan extremely simple and easy matter toremove a broken pin and substitute a new one therefor Whatl claim is:

l. A cam stop strip of the kind described having pins yieldingly mountedfor self-centering action. 7

2. The structure defined in claim 1 in which said pins are mounted on.the strip for lateral movement longitudinally thereof.

3, The structure defined in claim 1 in which said pins are mounted onthe strip for slight angular movement longitudinally thereo p I 1. A camstop strip of the kind described having a plurality of longitudinallyspaced relatively deep transverse seats with contracted passagewaysextending through the bottom of said strip, and pins having rela- Tltively long transverse heads removably mounted in said seats with saidpins extendin through said contracted passageways.

5. The structure defined in claim 4 in which said passageways are ofsuch width as to permit a slight angular movement of the pinslongitudinally of the strip.

6. A cam stop strip of the kind described having a plurality oflongitudinally spaced l0 relatively deep transverse bore-like seats saidpins extending through said contracted 15 passageways with freedom forslight angular movement longitudinally of the strip.

In testimony whereof I aflix my signature.

GEORGE LOUIS CURLE.

